Hydrodynamical techniques are also widely adopted to study the formation of high redshift QSOs. As mentioned above simulations of large cosmological volumes are required to account for the low number density of \(z\sim 6\)  QSOs.
Some examples of large volume hydrodynamical simulations (box size \(>100\)  Mpc) including BHs are: the Horizon-AGN [1]}; Illustris [2]}; IllustrisTNG [3]}; EAGLE [4]}; MassiveBlack [5]}; BlueTides [6]}; Magneticum [7]} and Simba [8]}.
